Carburetor



July 22 1924. 1,502,378

- p. DREIS 'GA'HBURETOR Filed July 5, 1921 FIGURE 1 FIGURE 6 FIGURE 4mvsn'ron v v M (5 w 7 ATTORNEY Patented July 22, 1924.

UNITED STATES HERMAN C. DREIS, OF NEAR SAN JOSE, CALTFORNIA.

OARBURETOR.

Application filed July 5, 1921.' Serial No. 482,538.

To all whom it may concern:

Be it known that I, HERMAN C. DREIS, a citizen of the United States, andresiding near San Jose, in the county of Santa Clara and State ofCalifornia, have invented certain new and useful Improvements inCarburetors, of which the following is a specification.

The object of the invention is to provide a means for measuring outdesired quantities of fuel in internal combustion engines. A particularobject is to provide a measuring element provided with a positive fuelfeed and discharge.

In the drawing,-

Figure 1 is a sectional view on line 11 of Figure 2.

Figure 2 is a section on line 2-2 of Figure 1.

Figure 3 is a detail elevation of the measuring element closed, partbroken away.

Figure 4 is a detail elevation of the measuring element partly opened,part broken away.

Figure 5 is a detail of the float mountm in the drawing, 1 is acarburetor casing, 2 the fuel chamber provided with floats 3, connectedby rod 3 and 4 the fuel inlet provided with a needle valve 4*, which isopened or closed by the action of arm 24 against the spring 4". Thecarbureting chamber is shown at 5, the opening 6 in casing 1communicating therewith. At 5 is an auxiliary air inlet to carburetingchamber 5 controlled by a valve 5 and at 5 is a conduit by means ofwhich the fuel mixture prepared in chamber 5 is conducted to the engine,not shown, A hollow shaft 7 is fixed in casing 1 and carries a shield 8on spokes 9 and web 10, web 10 having a slot 11 therein communicatingwith hollow shaft 7 and the exterior of shield 8, and shield 8 beingformed to provide an air passage 12 above its upper portion.

Fitting closely between casing 1 and shield 8 is a drum having openings13 and 14 formed in two parts 13 and 14 connected by interlockingfingers 15-16, part 13 being revolubly mounted on shaft 7 by sleeve 17driven by gear 18, and part 14' being mounted on shaft 7 by sleeve 19and ad vanced or retracted by lever 20. At 21 is a screened air inletthrough casing 1 which communicates with air passages 12 through thepockets 22 formed by the interlacing fingers 15-16 of drum 1814. Thisconstruction insures a supply of air to passage 12 in the event slot 11or the passagethrough shaft 7 becomes obstructed.

Pockets 22 of desired capacity formed in the drum by advancing orretracting part 14, are filled with fuel by immersion therein. The fuelis held in pockets 22 by shield 8 and casing. 1 until it reaches opening6 where the air passage 12 permits its quick removal.

Revolving drum 1314 produces different fuel levels in opposite sides ofchamber 2, therefore floats 3 are swiveled at 23 in bellcrank 24. Thisis deemed necessary because when the drum 1314 is in operation the lowerlevel of the fuel on the side from which the drum is revolving would sofar reduce the buoyant force of the fuel on the float on that side thatit would operate the part 24 to introduce fuel before it is needed ifthe floats and part 24 were in fixed relation to each other. Byswivelling the floats on part 24 they retain their proper relation tothe liquid level and only operate parts 24 when the total amount ofliquid in the chamber is reduced below a given point.

It is to be understood that changes in form, construction and method ofoperation may be made within the scope of the appended claims.

I claim:

1. In a carburetor, a revoluble two-part drum provided with interlockingfingers, means for changing the relative position of the two parts toform pockets between said fingers, means for filling said pockets withfuel, and means for retaining the fuel in said pockets during a portionofthe revolution of said drum.

2. A carburetor comprising a casing, a fuel chamber, a carburetingchamber, a twopart drum provided with fingers, revolubly mounted betweensaid chambers, means for changing the relative position of the two partsto form pockets between said fingers, and means for admitting fuel intosaid drum.

3. A carburetorcomprising a casing, a fuel chamber, a carburetingchamber, a twopart drum provided with interlocking fingers revolubly'mounted between said chambers, means for. changing the relativeposition of the two parts to form pockets between said fingers, meansfor admitting fuel to said pockets, and means for retaininterlocking ingthe fuel in said pockets during their passage from the. fuel chamber tothe car- I bureting chamber.

4. A carburetor comprising a casing, a fuel chamber, a carburetingchamber, a tWopart drum provided With interlocking fingers revolublyemounted between said chambers, means for changing the relative positionof the two parts to form pockets between said fingers, .means foradmitting fuel to said pockets, and means forretaining the fuel in saidpockets during their passage from the fuel chamber to the carburetingchamber and means for conducting air into said drum to a point adjacentthe 'carbureting chamber.

HERMAN c. DREIS;

